RAF Typhoon fighter aircraft have joined forces with France's air force in a coordinated attack on an underground arms cache in Syria employed by the IS group, as stated by the UK's MoD.
The facility, identified by reconnaissance, was assessed as containing munitions and bombs, the release indicated, and was located in mountains just to the north of Palmyra in central Syria.
"Our aircraft used laser-guided Paveway IV weapons to strike a several approach shafts down to the facility... early reports indicate the objective was successfully hit," the MoD said.
There was no indication of any civilian impact in the attack on Saturday evening and all the aircraft returned to base without incident, the MoD added.
The Typhoon fighters were supported by a Voyager refuelling tanker.
Daesh - also known as Daesh - established militant control over parts of Syria and Iraq until 2019.
"This operation demonstrates British leadership, and determination to work closely with our allies, to eradicate any resurgence of the terrorist group and their harmful and extremist ideologies in the area," the British Defence Secretary John Healey remarked.
UK warplanes have performed overwatch operations over Syrian airspace to "prevent any attempted comeback" of Islamic State subsequent to its defeat at the climactic battle in Baghuz in the year 2019, the ministry said.
"I must thank every member of British forces who took part in this mission for their expertise and their courage," he said. "They were part of thousands of British personnel stationed over Christmas and New Year. This operation, to take out terrorist threats who endanger our security, highlights how UK forces are always on standby, all year round, protecting the UK within its borders and powerful internationally."
In December, the American forces carried out what it called a "major assault" targeting Daesh sites in Syria, after an assault claimed the lives of two US servicemembers and a civilian linguist in Palmyra.
The United Nations says IS still maintains an estimated 5,000 to 7,000 combatants in Syria and Iraq.
